STEPS 2000 JD 00193 11JULY2000

The following is the final listing of the times of sprites imaged at the Yucca Ridge Field Station. These are on visual inspection of the LLTV video monitoring system. All times are UTC. The times refer to the start of the 17 ms field in which the TLE was first visible.

SUMMARY: Partial operations. Mountain storms kept coming until after 0400Z, when sprinkles and lightning finally ended. Shot SONY/WIDE w/ image integration, then GEN III plus S-VHS dub, 1 KY 19 tape (FAS and/or LoLux), and 2 Xybions. Also tested Photodiode unit and VLF on CGs and spiders at 150-200 km.. Seemed to work well. As clearing continued still had excellent view of spiders from small MCS (10*4 km*2) about 150-200 km to ESE but it never made a sprite. Relatively low percent positive all night may well have been a factor. The Colorado storm was just barely large enough, but somehow no sprites. Why? Where the spiders associated with negative CGs?

Air rather clear. Moon illuminated clouds.

Total TLEs from Yucca Ridge This Campaign: 950+

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(S) = Sprite; (E) = Elve; (B) = Blue Jet; (CF/CG) = Cloud/Ground flash; (M)=Meteor

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JD 00193 – 11 JUL 2000

0300Z. Start LLTV Observations

0830End LLTV Observations

00-193

11 July 2000

SPRITE Times

06:46:44.836 [S]

06:50:12.993 [S]

07:00:37.313 [S]

07:00:37.430 [S]

07:30:27.877 [S]